X0306 4 2022-03-08 0 0000917273 RAMBUS INC RMBS 0001188095 KISSNER CHARLES C/O RAMBUS INC. 4453 NORTH FIRST STREET, SUITE 100 SAN JOSE CA 95134 1 0 0 0 Common Stock 2022-03-08 4 M 0 40000 4.13 A 62465 D Common Stock 2022-03-08 4 S 0 40000 28.049 D 22465 D Common Stock 68421 I See Footnote Employee stock option (right to buy) 4.13 2022-03-08 4 M 0 40000 0.00 D 2022-08-01 Common Stock 40000 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.85 to $28.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. The shares are held directly by Kissner and Associates LLC for which the Reporting Person serves as the owner of the company. The option award vests as to 12.5% of the granted shares on February 1, 2013, and the remaining shares vest monthly thereafter until fully vested on August 1, 2016. /s/ Keith Jones by power of attorney 2022-03-09